On 1/7/08, Robert Woodworth <[EMAIL PROTECTED]> wrote: > Hello! > > I'm building a new Virtex4-FX60 device. I have built it with the new > MPMC3 and a 256MB SO-DIMM. It works successfully with a "mem-test" type > embedded program. > > I cannot get it to boot a Linux kernel. I have traced it down to the > MMU not getting mapped correctly. > > I can load the kernel via jtag, get the pre-boot messages on the serial > but then when it tries to jump to 0xc0002218 (start_here: head_4xxx.S) > it fails with a "Machine check exception; invalid instruction address". > > Using the debugger and examining the memory once the mmu is suppose to > be configured, I see that it is not mapping 0xc0000000 to the proper > location. I'm sure I've set something up wrong in my FPGA and I need to > re-synthesize. But what?
Hmmm, I haven't seen that failure mode before. MMU handling on an of my virtex platforms has never been a problem. Take a look at the TLB registers to see how they are configured to see if the mappings are really getting written. What kernel version are you using? Cheers, g. -- Grant Likely, B.Sc., P.Eng. Secret Lab Technologies Ltd. [EMAIL PROTECTED] (403) 399-0195 _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
